<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>内边距会影响盒子实际大小</title>
    <style>
      div {
        /* 让 width/height 减去多出来的内边距大小 */
        width: 160px;
        height: 160px;
        background-color: pink;
        padding: 20px;
      }
    </style>
  </head>
  <body>
    <div>
      padding会影响盒子实际大小padding会影响盒子实际大小padding会影响盒子实际大小padding会影响盒子实际大小
    </div>
  </body>
</html>
